/usr/lib/R/site-library/ROCR/INDEX is in r-cran-rocr 1.0-5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 | ROCR.hiv                Data set: Support vector machines and neural
                        networks applied to the prediction of HIV-1
                        coreceptor usage
ROCR.simple             Data set: Simple artificial prediction data for
                        use with ROCR
ROCR.xval               Data set: Artificial cross-validation data for
                        use with ROCR
performance             Function to create performance objects
performance-class       Class "performance"
plot-methods            Plot method for performance objects
prediction              Function to create prediction objects
prediction-class        Class "prediction"
 |